Can I ask for a refund or credit next year? For compatibility, separate paragraphs and headings with one or more blank lines. (Tenured faculty). txt with the name you want attached to the newly created text file. Surround bold text with two asterisks, like this **easy to use**. Naming code chunks is useful for long documents with many chunks. This is what I used to control font size and color in an R-markdown file.